More Details Emerge About NYC Motorcycle Road Rage Incident

Undercover police officer was at scene; police look for more bikers who may have witnessed attack.
2:10 | 10/04/13

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Transcript for More Details Emerge About NYC Motorcycle Road Rage Incident
determine what made the father snap. Stunning new developments in that other terrifying encounter on a highway, this one right here in new york. That video captured on helmet cam showing the moment an suv is swarmed by bikers, a young family inside. For the first time tonight, we are seeing what happened next. After that camera stopd rolling. Tonight police say they have a suspect in the attack as a new eyewitness speaks out. ABCs LINDSAY JANIS BACK ON THE Story tonight. Reporter: Imagine this, the rumble of engines, back after bike surrounding your car. That's what alexian lien behind the wheel of that black suv saw. That biker slowing down, before the impact setting off the harrowing eight minute chase. Lien's wife called 911 four times. Before this. The final frame of the video. But now, these pictures, which police are using to try and identify the bikers, showing what happened next. On the ground, surrounded by bikers, his terrified wife hanging out of the passenger side door. Once the bikers fled, here clutching her child. Tonight, police say they are now looking for half a dozen additional bikers, who may have had a role in the assault. The motorcyclists see it differently. One telling abc news what he saw. Once you put your car in the midld of a bunch of bikes, what is going to happen? On the highway, he started this lane to that lane, speeding up. Getting up on the back of the bikes. Reporter: Today attorney gloria allred spoke on behalf of edwin mieses, the biker left paralyzed. He was attempting to diffuse the situation. Edwin did not do anything that justified mr. Lien's decision to drive his range rover over him. Reporter: This just in. The man seen in the video briefly opening the driver side door of the suv turned himself into police. Charges against him are pending. Yet, another twist tonight. Police say one of the bikers was an off duty undercover narcotics cop. David, they say he did not intervene, when the assault was happening, for fear of blowing his cover. A horrible story all week. Lindsey, we appreciate your reporting.

This transcript has been automatically generated and may not be 100% accurate.

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